German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 1: Recording of analysis results (A 1)— 18 стр.
Standardization - Part 2: Presentation of documents (ISO/IEC Directives - Part 2:2011, modified); Trilingual version CEN-CENELEC Internal Regulations - Part 3:2011— 240 стр.
Standardization - Part 2: Presentation of documents (ISO/IEC Directives - Part 2:2016, modified); German and English version CEN/CENELEC Internal Regulations - Part 3:2017— 231 стр.